Telescoping post



June 8, 1948 J. ORIOLD TELESCOPING POST Filed Nov. 14, 1946 INVENTOR 252ml OR lOLD b1 M'corneg.

Patented June 8, 1948 UNITED STATES OFFICE 6 Claims.

This invention relates to new and useful improvements in telescoping posts, with particular reference to telescoping posts such as are used in music-stands and microphones.

An object of this invention is to provide a more simplified and inexpensive telescoping device than those heretofore in use.

A further object of this invention is to provide a means for securely retaining the telescoping members in adjusted position which can be readily released so as to permit adjustment of the telescoping members.

A still further object of this invention is to provide a telescoping device which may be either completely opened or closed in a single manual movement.

According to this invention I provide a telescoping post comprising inner and outer telescoping members, the outer member being hollow and the inner member being longitudinally adjustable therein, a sleeve slidably mounted on the inner member having an inwardly projecting shoulder, a cramping ring loosely mounted on the inner member within the collar above the shoulder, and a projection mounted at the upper end of the outer member adapted to tilt the ring to cramp it on the inner member and prevent the inner member from telescoping within the outer member, the sleeve shoulder being adapted on moving the sleeve upwards to engage and straighten the cramping ring so as to permit the movement of the inner member relative to the outer member.

The novel features of this invention will hereinafter appear in detail in the description that follows and are illustrated, by way of example, in the accompanying drawings in which similar reference characters indicate corresponding parts and in which Figure l is a side elevation;

' Figure 2 is a fragmentary vertical section showing the cramping ring in the tilted position;

Figure 3 is a fragmentary vertical section showing the cramping ring in the straightened position; and

Figure 4 is a cross section on the line 4-4 in Fig. 2.

In the drawings a small rod or tube I telescopes within larger tube 2, which in turn te1escopes Within a still larger tube 3. Tube 3 telescopes within a still larger tube 4.

For convenience the invention is described withreference to the connection between tubes 3 and 4 although it will be understood that a similar connection is provided between the other tubes.

A sleeve 5 with longitudinal slits 6 therein is secured to the lower end of tube 3. Tube 3 may be constructed so that sleeve 5 is an integral part thereof. Sleeve 5 is wider than inner tube 3 and frictionally engages the inside walls of outer tube 4. Flat coil springs l secured at one end to the inside of sleeve 5, tend to spread sleeve 5 out still further. This provides enough friction so that inner tube 3 normally will not slide in outer tube 1 except by'the application of additional weight or force. Instead of a flat coil spring a spiral coil spring may be employed.

An annular collar 8 having an upwardly pr0- jecting pin 9 is screwed on the upper end of outer tube 4. A sleeve I0 is slidably mounted on the lower end of inner tube '3 and extends over the upper end of tube 4. Sleeve ID has an inwardly extending flange H at its lower end which engages the underside of collar 8 and acts as a stop to limit the upward sliding movement of sleeve it. A cover l2 with a downwardly and inwardly sloping undersurface i3 is screwed on the upper end of sleeve l0. Cover l2 slidably embraces tube 3 and forms an inwardly extending flange which retains sleeve I0 spaced from tubes 3 and 4. A cramping ring M is loosely mounted on inner tube 3 within sleeve l0. Sleeve H is provided with an internal annular shoulder adapted to engage and support the cramping ring l4 when the sleeve is in raised position shown in Fig. 3.

The weight of sleeve Ill normally causes it to drop to the position shown in Figure 2 or it may be pushed into that position. Undersurface [3 of cover l2 engages cramping ring M against pin 9 which supports one edge of the ring tilting it to cramp it on inner tube 3, as shown in Figure 2, so as to prevent it telescoping within outer tube 4. The angle of the undersurface l3 of the cover 12 permits the tilting of the cramping ring. To change the relative positions of tubes 3 and e, i. e. to lengthen or shorten the telescoped post, sleeve i9 is lifted manually, thereby engaging ring M on its shoulder i5 and lifting it to the straight or horizontal position, as shown in Figure 3. Tubes 3 and 4 can then be manually. adjusted relative to one another and sleeve ill then released, whereupon it will drop or may be pushed down to the position shown in Figure 2, causing ring it to tilt and lock the tubes in the new adjusted position. It is to be noted that when ring 14 is in the locking position while the post is prevented from being shortened it may be lengthend merely by pulling on tube 3, without any adjustment of sleeve l0. I

Referring to Figure 1, inner tube 3 WhlCh telescopes within outer tube 4 serves as the outer As sleeve I is pushed upwards it first straightens cramping ring l4 so as to permit tube-34:0

telescope within tube 4. At the end of this telescoping movement cover l2 engages the-lower end of sleeve l6 and moves-ibupwardsto tele scope tubes 2 and 3. Similarly, in turn, sleeve acts as sleeve l1, thereby resulting inthe-complete telescoping of the post in a single manual movement.

It is'thought that the'constructionand use of the invention will be'c'apparent from the-above description; of thervariou'sparts and-their purposei It is to be understood'that th'evform'of the .Iinventi'on'herewith shown and described; is to beitaken as za preferred .example'of the'same. and' thativarious' changes in the shape; size and arrangement of parts mayberesorted to, without departing from 'thezspirit of the invention orth'e scope 'of the subjoined claims.

What I claimzas any inventionris:

1. In a telscopi'ng post, inner and outer 'telescoping members; the outer member beinghol'low and' the inner member being longitudinally adjusta-ble therein, a-sleeve 'slidably mounted on the inner'memberhaving an inwardly projecting shbulder; a-cramping-ring looselymounted on the inner member with-in the sleeve above the shoulder, and a projection mounted at the upper end-ofthe outer member adapted to tilt the ring to cramp it on the inner member-and prevent the inner member from telescoping within theouter member; the 'sleeve' shoulder being adapted on movingthesleeveupwards to 1 engage and straightenthe-crampingring so as to permit the movement oftheinner member relative to the outer member:

2-. In' a telescoping post; inner i and-"outer i telescoping members, the outermember being hollowand-"the-inner' member I being longitudinallv adjustable therein,- a sleeve slidably mounted on the inner member extending over the outer member'and' havinggan inwardly projecting shoulder, a cramping ring loosely mounted on the inner member'with'inthesleeve above the shoulder, a projection mounted at the-upper end of the outer member adapted to-til-t-the ringtocramp it on the inner memberandprevent the-inner member from: telescoping within the outer member, the

sleeve shoulder-being adapted 1 on moving the sleeveupwards to engage and straighten-the cramping-ringso'as to permit themovement of the inner member relative" tothe outer member, and-stop means *mounted at the-upper end of adjustablethereinya 'sleeveslidably mounted on the innerme'mber-havingan inwardly projecting shoulder, a cramping ring 'ldoselymoun-ted 'on the innermember-within the sleeveabovethe shoulder," acollar mounted on the outermemb eradiacent its upper end having a pin extending upwards therefrom, the pin being adapted to tilt the ring to cramp it on the inner member and prevent the inner member from telescoping within the outer member, the sleeve shoulder being adapted on moving the sleeve upwards to engage and straighten the cramping ring so as to permit the movement of 'the inner member relative tor the outer :rnemltier.

4: In a--telescoping post; inner-andouter telescoping members, the outer member being hollow and the inner member being longitudinally adjustable therein, a sleeve slidably mounted on the inner member extending over the outer member and h'avingaan -inwardly projecting shoulder, a

crampingring loosely mounted on the inner member within the sleeve above the shoulder, a' -coll'arimounted on the outer member adjacent its upper end having a pin extending up- .wards therefrom, the collar being, positioned sleeve adapted to engage the-collarto limit the upward movement of thesleeve.

5. In o, -telescopingpost,- innerand-outer telescoping memberaq the outer member 1 being hollow andthe inner member r being longitudinally adjustable therein, a. sleeve slidably mountedaon theinnermemb er extending over the outer memher; thesleeve havingfl an inwa,rd1y,-- projectin shoulder andan inwardly. extending-flange 5 having a dow-nwardly'and inwardlysloping'undersurface, the flange embracing: -the inner member and-retaining-the-sleevespaced'from.themembers, a= cramping,- ring; loosely 7 mountedon the. :inner member within thesleeve above theshoulderand below said. flange; a-icollar mounted onthe outer member adjacent its upperend-having a a pin extending upwardsntherefrom', the collar? being positioned within the sleeve, the sloping umdersurfacebeing-;adapted-:toengage the cramping ring against the-pin to tilt the ring tocramp it i on '-theinner member and prevent the inner member from telescoping -vvithin 'the outer memher, the sleeve shoulder being adapted-.on moving the sleeveupwards 'toengage 1 and=straighten the cramping'ring so as iteapermit the movement of the'inner'member relativetothe'outer member, and-stop means adjacent the lower end-of the sleeve adapted toengage the-.vcollartolimit the upward movement of the sleeve.

6. In a telesooping-.post-,z arplurality' of-v-hollow telescoping membersof progressively increasing size forming successive 1 pairs -ofinner and; outer members in'which the outer 'memberfiofnone'pair forms the inner member forithe-next-pair and: in which the inner member is longitudinally;adiust ablewit-hin the outer member eachpair having a sleeve slidably mounted on the inner member extending over theouter member and having. an inwardly projecting= shoulder; a crampingzring loosel'yr-mountd ont each inner member within each sleeve abovethe shoulder; aucollar'mounted on each outenmemberadjacent itsiupper' end having" a projection extending. upwards-*th'erefrom, each'collar-being positioned'withirr a. sleeve andthe :proj ection -beingradaptedto :tiltthezring to cramp it on the inner member and prevent thle the upper end of each sleeve being adapted when the device is being shortened to engage the lower end of the sleeve above it so as to move it upwards and permit the shortening of the pair of inner and outer telescoping members with which the latter sleeve is associated.

JOSEPH ORIOLD. 

